# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html


# useful for handling different item types with a single interface
from itemadapter import ItemAdapter

from scrapy.exporters import CsvItemExporter

#存为CSV文件
class WangyinewsPipeline:


    def __init__(self):
        self.file=open('news_data.csv','wb')
        self.exporter=CsvItemExporter(self.file,encoding='utf-8')
        self.exporter.start_exporting()


    def close_spider(self,spider):
        self.exporter.finish_exporting()
        self.file.close()

    def process_item(self, item, spider):
        self.exporter.export_item(item)
        return item
